CN1317840C - Device in CDMA cellular mobile ratio system - Google Patents
Device in CDMA cellular mobile ratio system Download PDFInfo
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- CN1317840C CN1317840C CNB991177177A CN99117717A CN1317840C CN 1317840 C CN1317840 C CN 1317840C CN B991177177 A CNB991177177 A CN B991177177A CN 99117717 A CN99117717 A CN 99117717A CN 1317840 C CN1317840 C CN 1317840C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/204—Multiple access
- H04B7/216—Code division or spread-spectrum multiple access [CDMA, SSMA]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
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Abstract
Device enabling different spreading factors whilst preserving a common scrambling code, in particular for transmission in a code division multiple access cellular mobile radio system, the device including, on transmission, for spreading K incoming sequences by means of K respective spreading codes of respective length Qk (k=1, ..., K) which is a sub-multiple of a maximum length QMAX, and scrambling the spread sequences obtained in this way: means (311 to 31K) for grouping the various data symbols of the kth incoming sequence (k=1, ..., K) into different blocks of QMAX/Qk symbols.
Description
The communication system of relate generally to spread-spectrum of the present invention uses an extended code that one row data to be sent are carried out spread spectrum therein when just sending, and opposite, realizes despreading when receiving, to obtain the system of initiation sequence.
Use the be expressed as C of a length (or spreading factor) as Q
Q=(c1, c2 ..., C
Q) the sign indicating number to one be expressed as (d1, d2 ..., dN) the data sequence of coming of N symbol expand, can produce the sequence of a length QN, this sequence can be expressed as follows:
(d1·c1，d1·c2，…，d1·C
Q，d2·c1，d2·c2，…，dN·C
Q)
Wherein d1c1 represents the product of d1 and c1.
The another kind of this sequence spreading of length QN represents it is (d1C
Q, d2C
Q..., dNC
Q), d1C wherein
QExpression symbol d1 and extended code C
QProduct.
More general way of expanding is that each symbol of the sequence that enters all has a different extended code, and the sequence spreading that at this moment obtains at last can be expressed as (d1C
Q(1), d2C
Q(2) ..., dNC
Q(N)), C wherein
Q(1) is the extended code relevant with symbol d1.All extended codes preferably have same length Q, so that make the sequence spreading that obtains at last that length QN be arranged.
Fig. 1 simply represents the principle expanded, T
SThe basic cycle (or symbol period) of a non-expanding sequence of expression, T
CThe basic cycle (or " chip " cycle) of a sequence spreading of expression.T
SAnd T
CBetween relational expression T is arranged
S=QT
CTwo continuous symbols of the arrival sequence of the corresponding non-expansion of dn and dn+1 in this figure, and d ' l and d ' l+1 are to two continuous basic symbols (or " chip ") of the same escape character of the sequence that should arrive.
A benefit of above-mentioned each system is by distributing different sign indicating numbers to make that a plurality of users can shared same frequency band for different users.
A kind of important use is the cellular mobile radio system of code division multiple access (CDMA).
Owing to various reasons, anti-interference particularly including improving, perhaps in order to guarantee the confidentiality of the information that is sent out, in these systems, before transmission, use a scrambled code (or sequence) usually with a sequence spreading scrambling.
With one be expressed as (v1, v2 ... vL) length be L scramble sequence to one row come be expressed as (d ' 1, d ' 2 ... the sequence of a d ' L L) basic symbol or " chip " is carried out scrambling, the sequence that to produce a length be L, and this sequence can be expressed as follows:
(d′1·v1，d′2·v2，…，d′L·vL)
This scramble sequence can be a very long typical pseudo random sequence.A sequence of this class at least can be by making it to become the interference signal that prevents at random during described scramble sequence.
This scramble sequence also can be the equal sequence of the length Q that is typically length L and extended code (or its integral multiple) of a weak point, as shown in Figure 2, here use a kind of expression identical, and d wherein with Fig. 1 " l and d " l+1 represents the same that be expanded of this arrival sequence and by two of the symbol of scrambling continuous basic symbols (or " chip ").By specifying different scramble sequence to the sub-district of reusing these identical extended codes, this can lower the interference of minizone especially.Benefits of these short sequences be can produce have stability of period, transmission signal that its cycle is proportional to L, the feasible algorithm that can effectively use some grade as described below.For example, in " the Expoitationof Spectral Redundancy in Cyclostationary Signals " of the IEEE signal processing magazine 14-36 in April, 1991 page or leaf one literary composition, can see narration to stability of period.
Use a kind of decoding algorithm that can identify interference signal and get rid of at the receiver place, particularly, can reduce the phase mutual interference between the user in the same sub-district according to the signal that receives with to the understanding of each user's various sign indicating numbers.The example of this decoding algorithm has so-called probe algorithm or the combined detection algorithm of subtracting each other.If the signal of all cycle stabilities all has the same short period, just might use the algorithm that utilizes its character especially.For example, in " the Interference Rejection in Digital WirelessCommunications " of the IEEE signal processing magazine 37-62 in May, 1997 page or leaf one literary composition, such algorithm has been described.
In these cellular mobile radio systems, particularly when changing, user's bit rate itself (for example sending under the data conditions of multimedia type), perhaps must in data to be sent, add because of the propagation condition of radio signal or high or low redundancy with or high or low degree ground prevent to send error, be necessary can earthquake bit rate time transmission data.
In order to increase a user at same assigned frequency band (T during same just
CIn) bit rate of the data that will send, if surpassed the capacity of the single sign indicating number of length Qm, just knew the sign indicating number that distributes a plurality of length Qm to this user originally.
The special disadvantage of the technology of mentioned kind is some complex situations when causing realizing.
The known in fact another kind of technology that can avoid above-mentioned shortcoming is the length that reduces to distribute to user's sign indicating number, makes this user can continue only to send with a sign indicating number, to increase this user at same assigned frequency band (T during same just
CIn) bit rate of the data that will send.Fig. 3 summarizes the principle of having represented this kind technology, and used representation with the same type of Fig. 1, Fig. 2, but two kinds of bit rate differences of the sequence that arrives, use tail tag 1 and 2 marks respectively, be with respect to three of the sequence of coming continuous symbol dn, dn+1 and dn+2 in this case, should be T mutually for symbol dn symbol period
S1 and be T for symbol dn+1 and dn+2
S2, be Q1 and be Q2 for the code length of symbol dn for the code length of symbol dn+1 and dn+2.
Can go wrong due to the fact that, that is exactly that cellular mobile radio system may need to manage simultaneously a plurality of its instantaneous bit rates thereby the different users that also may get different value in time respectively of its each extended code.Problem is some algorithm, especially decoding algorithm, and the decoding algorithm that particularly relates to does not above add (no matter simultaneously or not simultaneously) of the sign indicating number of the different length that change to be to receive different user.For example, the complete obiteration of the stability of period of all signal summations has perhaps become and can not use too greatly.
A specific objective of the present invention is that this problem is proposed a solution, and the necessity of particularly avoiding changing these algorithms is so that they can receive the combination of the sign indicating number of different length.
Therefore, one aspect of the present invention is a kind of device, when this device is used in particular for sending in a kind of CDMA cellular mobile ratio system, making when preserving a public scrambled code to have different spreading factors, includes basically when this kind device is used to send to be used for length Q
MAXBe a scrambled code of the multiple of described each different spreading factors be used for using described spreading factor any one expand resulting Q
MAXScrambling equipment on the piece of individual basic symbol.
Therefore, each expansion that obtains like this all have and Q with sequence scrambling
MAXProportional cyclo-stationary makes it possible to effectively use ELIMINATION OF ITS INTERFERENCE algorithm above-mentioned, and thereby can avoid above-mentioned various shortcoming.
Another aspect of the present invention is a kind of device, when this device is used in particular for sending in a kind of CDMA cellular mobile ratio system, make to have different spreading factors when preserving a public scrambled code, this kind device includes when being used to send and is used to use respective length Q
K(k=1 ..., K) be a maximum length Q
MAXThe corresponding extended code of K of an approximate number K sequence of coming expanded and each sequence spreading that so obtains carried out scrambling:
The sequence that is used for k is come (k=1 ..., K) various data symbols grouping becoming Q
MAX/ Q
KThe equipment of each different masses of individual symbol,
Be used to use length to be Q
KCorresponding sign indicating number to the sequence of coming from k (k=1 ..., K) different masses expand, to include length be Q to obtain one
MAXThe equipment of sequence spreading of different extension blocks,
Use a length to be Q
MAXScrambled code in K the sequence spreading that so obtains each is carried out the equipment of scrambling.
Another aspect of the present invention is a kind of device, when this device is used in particular for sending in a kind of CDMA cellular mobile ratio system, feasible when preserving a public scrambled code have different spreading factors, includes in fact when this kind device is used to receive to be used for length Q
MAXBe any one Q that expands to obtain that a scrambled code of the multiple of described each different spreading factors is used for using described spreading factor
MAXDescrambling equipment on each piece of individual basic symbol.
Another aspect of the present invention is a kind of device, when this device is used in particular for sending in a kind of CDMA cellular mobile ratio system, makes to have different spreading factors when preserving a public scrambled code.This kind device includes when being used to receive and is used to use respective length Q
K(k=1 ..., K) be a maximum length Q
MAXK the corresponding extended code of an approximate number sequence of coming is carried out descrambling and despreading:
Use a length to be Q
MAXScrambled code described sequence of coming is carried out the equipment of descrambling,
It is Q that each basic symbol that is used for expansion and this sequence descrambling that will so obtain divides into groups to become length
MAXThe equipment of each different extension blocks,
Be used to use K corresponding sign indicating number that each extension blocks that so obtains is carried out despreading, to obtain by Q
MAX/ Q
KIndividual symbol (k=1 ..., the equipment of K the despreading sequence that each different masses K) constitutes.
Also with a travelling carriage (or portable terminal) and a mechanism, the base transceiver station that is used for a kind of mobile radio communication system that particularly includes the mentioned kind device is as its target in the present invention.
The explanation that below reading an embodiment is provided with reference to each accompanying drawing can be understood other each target and characteristics of the present invention.In the accompanying drawing:
-Fig. 1 is the schematic diagram of the spread spectrum of a sequence of coming of expression,
-Fig. 2 is the spread spectrum of a sequence of coming of expression and the schematic diagram of scrambling,
-Fig. 3 is the schematic diagram that is illustrated in the spread spectrum under a kind of extended code situation of variable-length,
-Fig. 4 is a kind of block schematic diagram of an example of transmitter that is used for the cellular mobile radio system of a kind of code division multiple access that the present invention can be suitable for,
-Fig. 5 is a kind of block schematic diagram of an example of receiver that is used for the cellular mobile radio system of a kind of code division multiple access that the present invention can be suitable for,
-Fig. 6 is the block schematic diagram that uses an example of a kind of device in transmission according to the present invention,
-Fig. 7 is the block schematic diagram that uses an example of a kind of device in reception according to the present invention,
-Fig. 8 is the schematic diagram of explanation according to the work of a kind of device of the present invention,
The transmitter that is illustrated among Fig. 4 includes:
-use C
Q1 (1)To C
QK (K)Corresponding K the equipment 2 that data sequence ST1 to STK expand of extended code of K to coming,
Scrambled code C of-use
ETo K the equipment 3 that data sequence ST ' 1 to ST ' K carries out scrambling from equipment 2,
-receive each sequence ST from equipment 3 " 1 to ST " modulating equipment 4 of K,
-receive from each modulation signal of equipment 4 and send the transmitting apparatus 5 of corresponding radiofrequency signal.
The receiver that is illustrated among Fig. 5 includes:
-receiving equipment 6,
-demodulated equipment 7,
The described scrambled code C of-use
ETo a data sequence SR from equipment 7 " carry out the equipment 8 of descrambling,
-use C
Q1 (1)To C
QK (K)The corresponding extended code of K a data sequence SR ' from equipment 8 is carried out despreading and send K despreading sequence SR1 to SRK, be used in equipment 8 in the treatment facility 10, to send a data sequence SR who receives by a kind of decoding algorithm of type above-mentioned.
This device according to this invention that uses when sending can use in the expansion equipment 2 and scrambling equipment 3 at Fig. 4.Can use in a base transceiver station according to this device of the present invention in this case, be used for to expand by corresponding each data sequence of coming of each different user of this base transceiver station service.This device also can specify variant extended code to use in a portable terminal by giving this user.
That uses during the transmission represented among Fig. 6 includes according to this device of the present invention:
-as the sequence that is used for k is come (k=1 ..., each data symbol grouping becoming Q K)
MAX/ Q
KIndividual symbol (d
1 (K), d
2 (K)..., d
(K) QMAX/QK) the equipment of equipment 311 to 31K of each different masses,
-as be used to use corresponding sign indicating number C
QK (k)To the sequence of coming from k in such a manner (k=1 ..., K) each piece of obtaining expands, to include length be Q to obtain one
MAXEach extension blocks (d
1 (K)C
QK (k), d
2 (K)C
QK (k)..., d
(K) QMAX/QKC
QK (k)The equipment of equipment 321 to 32K of sequence spreading,
-as use a length to be Q
MAXScrambled code C
EAmong K the sequence ST ' 1 to ST ' K that so obtains each is carried out the equipment of the equipment 331 to 33K of scrambling.
Equipment as equipment 311 to 31K is according to maximum length Q
MAXWith corresponding code length Q1 to Q
KControl.If have one length Q in these yards at least
KCan change, particularly become along with the bit rate of the corresponding sequence of coming, then these equipment make the Q of symbol of each piece
MAX/ Q
KNumber can be changed for this corresponding sequence, makes the product of length of this number and this yard keep constant and equal Q
MAX
Be used in especially according to this device of the present invention in the descrambling equipment 8 and despreading equipment 9 of Fig. 5.Be used for despreading in this case, not only can use extended code to given user's appointment (if the sign indicating number that perhaps is assigned to this user during then use in these yards one) more than one, also can use to other all user's appointments each the sign indicating number (also may be to above-mentioned user's appointment other each the sign indicating number), to use, according to the present invention this device is used in a base transceiver station or a portable terminal data sequence of coming is carried out despreading just like those a kind of decoding algorithm above-mentioned.
The despreading device that is illustrated among Fig. 7 includes:
-use a length to be Q
MAXScrambled code C
ETo the sequence SR that comes " carry out the equipment 34 of descrambling,
-each data symbol of being used for the sequence SR ' of this descrambling that will so obtain divides into groups, and becoming length is Q
MAXEquipment of each different expansion chunks,
-as be used to use each corresponding sign indicating number as C
Q1 (1)To C
QK (K)Each yard carries out despreading to each extension blocks that so obtains, to obtain by Q
MAX/ Q
KEach different masses of individual symbol (k=1 ..., K) equipment of equipment 361 to 36K of K despreading sequence SR1 to SRK constituting.
As what point out above, can avoid like this revising decoding algorithm and make it can receive the necessity of combination of the sign indicating number of different length.
For the person skilled in the art, realize that each equipment of the block schematic diagram of pie graph 6 and Fig. 7 does not have any special problem.Therefore, these equipment do not need to be described in more detail at this, mention its function and get final product.
Notice that these schematic diagrames are theoretic schematic diagrames, clearly actual structure can be different, and particularly each part of each schematic diagram can be grouped together becomes public signal handling equipment.
Work according to a kind of expansion of the present invention or despreading device is indicated among Fig. 8.Wherein S is corresponding to the sequence of a non-expansion and non-scrambling, and S ' is corresponding to an expansion and sequence non-scrambling, and S " corresponding to an expansion and sequence scrambling.
This figure is to show for example:
-from the length Q of each data symbol of sequence S
MAX/ Q
KTwo continuous piece Bi and Bi+1,
The length Q of-sequence spreading S '
MAXTwo continuous extension blocks B ' i and B ' i+1,
-expansion with the sequence S of scrambling " length Q
MAXTwo continuous expansion chunk B " i and B " i+1.
Also should note the illustrated variation that different situations can be arranged.Particularly in order to improve efficient, for each different symbol of a data sequence that extended code was suitable for, this extended code can be different.
Claims (4)
1. the device that is used for sending at a kind of CDMA cellular mobile ratio system, different spreading factors can be arranged when keeping a public scrambled code, this device comprises at transmitting terminal and is used to use respective length Q
KThe K of (k=1,, K) corresponding extended code expanded K sequence of coming and each sequence spreading that so obtains carried out scrambling, wherein said respective length Q
KBe a maximum length Q
MAXAn approximate number:
Each data symbol grouping becoming Q of the sequence that is used for k is come (k=1,, K)
MAX/ Q
KThe equipment of each different masses of individual symbol (311 to 31K),
Be used to use length to be Q
KCorresponding sign indicating number the different masses of the sequence of coming from k (k=1,, K) is expanded, to include length be Q to obtain one
MAXThe equipment (321 to 32K) of sequence spreading of different extension blocks,
Use a length to be Q
MAXScrambled code in K the sequence spreading that so obtains each is carried out the equipment (331 to 33K) of scrambling.
2. be used for sending at a kind of CDMA cellular mobile ratio system, when keeping a public scrambled code, make the device that has different spreading factors, this device comprises at receiving terminal and is used to use respective length Q
KThe K of (k=1,, K) corresponding extended code carried out descrambling and despreading to a sequence of coming, wherein said respective length Q
KBe a maximum length Q
MAXAn approximate number:
Use a length to be Q
MAXScrambled code described sequence of coming is carried out the equipment (34) of descrambling,
Each basic symbol that is used for expansion and sequence descrambling that will so obtain divides into groups, and becoming length is Q
MAXThe equipment (35) of each different extension blocks,
Be used to use K corresponding sign indicating number that each extension blocks that so obtains is carried out despreading, to obtain by Q is arranged
MAX/ Q
KThe equipment (361 to 36K) of K the despreading sequence that each different masses of individual symbol (k=1,, K) forms.
3. be used for a kind of portable terminal of mobile radio communication system, include device according to claim 1 or 2.
4. mechanism, a kind of base transceiver station especially for mobile radio communication system includes the device according to claim 1 or 2.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9810345A FR2782428B1 (en) | 1998-08-12 | 1998-08-12 | DEVICE FOR ALLOWING DIFFERENT SPREADING FACTORS WHILE PRESERVING A COMMON JAMMING CODE, PARTICULARLY FOR CELLULAR MULTIPLE ACCESS RADIO COMMUNICATION SYSTEM BY CODES DISTRIBUTION |
| FR9810345 | 1998-08-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1255792A CN1255792A (en) | 2000-06-07 |
| CN1317840C true CN1317840C (en) | 2007-05-23 |
Family
ID=9529629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB991177177A Expired - Lifetime CN1317840C (en) | 1998-08-12 | 1999-08-12 | Device in CDMA cellular mobile ratio system |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US6868077B1 (en) |
| EP (1) | EP0980159B1 (en) |
| JP (1) | JP3210918B2 (en) |
| KR (1) | KR100353780B1 (en) |
| CN (1) | CN1317840C (en) |
| AU (1) | AU723704B2 (en) |
| DE (1) | DE69901762T2 (en) |
| ES (1) | ES2175906T3 (en) |
| FR (1) | FR2782428B1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2797122B1 (en) * | 1999-07-30 | 2006-08-04 | Commissariat Energie Atomique | METHOD OF TRANSMITTING DATA USING REPETITIVE REPETITIVE SETS OF RELEASE SEQUENCES, TRANSMITTER AND RECEIVER CORRESPONDING |
| JP2002033716A (en) * | 2000-07-18 | 2002-01-31 | Sony Corp | Cdma spread method and cdma terminal |
| KR100724929B1 (en) * | 2001-10-06 | 2007-06-04 | 삼성전자주식회사 | Apparatus and method for generating a scrambling code in cdma wireless communication system |
| GB2382955B (en) * | 2001-12-05 | 2004-03-03 | Motorola Inc | A code division multiple access (cdma) transmitter |
| US6741653B2 (en) | 2002-07-01 | 2004-05-25 | Interdigital Technology Corporation | Data detection for codes with non-uniform spreading factors |
| CN1170389C (en) * | 2002-11-13 | 2004-10-06 | 大唐移动通信设备有限公司 | Method for using long subzone codes in combined detection system |
| US7155236B2 (en) | 2003-02-18 | 2006-12-26 | Qualcomm Incorporated | Scheduled and autonomous transmission and acknowledgement |
| US20040160922A1 (en) | 2003-02-18 | 2004-08-19 | Sanjiv Nanda | Method and apparatus for controlling data rate of a reverse link in a communication system |
| US8705588B2 (en) * | 2003-03-06 | 2014-04-22 | Qualcomm Incorporated | Systems and methods for using code space in spread-spectrum communications |
| US8385296B2 (en) * | 2004-07-22 | 2013-02-26 | Industry Academic Cooperation Foundation Of Kyunghee University | Multi-carrier CDMA transmitting device and method using block-based multi-carrier spreading |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1133660A (en) * | 1993-09-24 | 1996-10-16 | 夸尔柯姆股份有限公司 | Multirate serial viterbi decoder for code division multiple access system applications |
| CN1182989A (en) * | 1996-09-11 | 1998-05-27 | 诺基亚流动电话有限公司 | Frame forming tech. for multi-rate code division multiple access communication system |
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|---|---|---|---|---|
| US5077753A (en) * | 1990-04-09 | 1991-12-31 | Proxim, Inc. | Radio communication system using spread spectrum techniques |
| US5550809A (en) * | 1992-04-10 | 1996-08-27 | Ericsson Ge Mobile Communications, Inc. | Multiple access coding using bent sequences for mobile radio communications |
| MY112371A (en) * | 1993-07-20 | 2001-05-31 | Qualcomm Inc | System and method for orthogonal spread spectrum sequence generation in variable data rate systems |
| WO1998020639A1 (en) * | 1996-11-07 | 1998-05-14 | Matsushita Electric Industrial Co., Ltd. | Code generating method and code selecting method |
| JP2815007B2 (en) * | 1996-12-05 | 1998-10-27 | 日本電気株式会社 | Variable rate CDMA spreading circuit |
| US6222875B1 (en) * | 1997-07-11 | 2001-04-24 | Telefonaktiebolaget Lm Ericsson (Publ) | Low-delay rate detection for variable rate communication systems |
| US6185199B1 (en) * | 1997-07-23 | 2001-02-06 | Qualcomm Inc. | Method and apparatus for data transmission using time gated frequency division duplexing |
| US6009091A (en) * | 1998-03-13 | 1999-12-28 | Motorola, Inc. | Method and apparatus for mobile station location within a communication system |
| US6643275B1 (en) * | 1998-05-15 | 2003-11-04 | Telefonaktiebolaget Lm Ericsson (Publ) | Random access in a mobile telecommunications system |
| US6504830B1 (en) * | 1998-06-15 | 2003-01-07 | Telefonaktiebolaget Lm Ericsson Publ | Method, apparatus, and system for fast base synchronization and sector identification |
| US6393047B1 (en) * | 1998-06-16 | 2002-05-21 | Telefonaktiebolaget Lm Ericsson (Publ) | Quadriphase spreading codes in code division multiple access communications |
-
1998
- 1998-08-12 FR FR9810345A patent/FR2782428B1/en not_active Expired - Fee Related
-
1999
- 1999-04-13 EP EP99400902A patent/EP0980159B1/en not_active Expired - Lifetime
- 1999-04-13 DE DE69901762T patent/DE69901762T2/en not_active Expired - Lifetime
- 1999-04-13 ES ES99400902T patent/ES2175906T3/en not_active Expired - Lifetime
- 1999-04-14 US US09/291,748 patent/US6868077B1/en not_active Expired - Lifetime
- 1999-07-27 JP JP21169099A patent/JP3210918B2/en not_active Expired - Lifetime
- 1999-08-11 KR KR1019990032854A patent/KR100353780B1/en not_active IP Right Cessation
- 1999-08-12 CN CNB991177177A patent/CN1317840C/en not_active Expired - Lifetime
- 1999-08-12 AU AU44460/99A patent/AU723704B2/en not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1133660A (en) * | 1993-09-24 | 1996-10-16 | 夸尔柯姆股份有限公司 | Multirate serial viterbi decoder for code division multiple access system applications |
| CN1182989A (en) * | 1996-09-11 | 1998-05-27 | 诺基亚流动电话有限公司 | Frame forming tech. for multi-rate code division multiple access communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100353780B1 (en) | 2002-09-26 |
| FR2782428B1 (en) | 2000-09-15 |
| ES2175906T3 (en) | 2002-11-16 |
| CN1255792A (en) | 2000-06-07 |
| FR2782428A1 (en) | 2000-02-18 |
| JP3210918B2 (en) | 2001-09-25 |
| EP0980159A1 (en) | 2000-02-16 |
| KR20000017241A (en) | 2000-03-25 |
| AU4446099A (en) | 2000-03-09 |
| JP2000188563A (en) | 2000-07-04 |
| AU723704B2 (en) | 2000-09-07 |
| DE69901762D1 (en) | 2002-07-18 |
| DE69901762T2 (en) | 2002-12-19 |
| EP0980159B1 (en) | 2002-06-12 |
| US6868077B1 (en) | 2005-03-15 |
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